Re: Change in image resolution of JPEG

Posted by Wayne Rasband on Apr 05, 2008; 9:47pm
URL: http://imagej.273.s1.nabble.com/Change-in-image-resolution-of-JPEG-tp3696665p3696667.html

> I am using ImageJ to add a scale bar to JPEG files taken with a  
> digital camera. These are 2048x1536 pix images that are rendered as  
> 17.34 x 13 cm, 300 pix/in images (these data from Photoshop). When  
> I apply a scale bar to them in ImageJ and save them in Jpeg (at 100  
> quality) they become 2048x1536 pix images that are rendedreed at  
> 72.25x54.19 cm, i.e. 72 pix per inch (data also from Photoshop).  
> This is problematic because they are to go inserted as linked files  
> in a Word document and when I update the Word field to point to the  
> new images with the scale bars they blow up. Could anyone let me  
> know if there is an easy fix for this? Is there a global parameter  
> that makes Imagej save the Jpegs at 300 pix/inch? Thanks in advance

You can do this in ImageJ 1.40d by setting the scale in the  
Analyze>Set Scale dialog to 300 pixels per inch. You can upgrade to  
v1.40d by using the Plugins>Utilities>Update ImageJ command and  
selecting "daily build" from the drop down menu.

-wayne